This post covers two major problems I have been having. I am currently running Windows 7 64 bit build 7057. However, some of my problems span back to when I was running Windows Vista Ultimate 64bit 1. Configuration Motherboard: Intel DX48BT2 Processor: Intel QX9770 Core 2 Extreme 3.2GHz Memory: 8GB of OCZ DDR3 PC3-10666 1333MHz memory in 4 2GB modules HDD: Samsung HD103UJ Spinpoint 1TB running at 7200 rpm PSU: Powork Model 680 providing 680 Watts of Power CD/DVD: HP DVD Writer 1140i OS: Windows 7 Ultimate 64bit Build 7057 Graphics: ATI Radeon HD 4870 X2 with 2GB of GDDR5 VRAM In April, my Visiontek ATI Radeon HD 4870 X2 graphics card started failing while playing Fallout 3 and Halo 2. I sent the card in and had to wait more than two months to get the card back. When I did, I installed the card and the drivers and restarted to activate the drivers. When I did it got to the "Starting Windows" screen and then both of the monitors went blank and the fan on the card when into max speed. I tried again and got the same results. I was running the latest drivers, but I tried downgrading the drivers. Still I had the same problem. I tried reinstalling Windows 7 and adding the card again. Just like before, the card failed whenever I activated the drivers and rebooted. I tried downgrading to Windows Vista. Still, the problem persisted. I then tried downgrading the drivers to the version that I had when I had sent the card off in April (back when I was running Windows Vista). The problem still persisted. I switched to my substitute card (see problem 2) and upgraded to Windows 7. I then tried the ATI card one more time. Still no luck. I have tried contacting Visiontek, the manufacturer of the card but they insist that the card had been tested before they shipped it back to me and that the problem must be my fault. Typical. I tried contacting ATI and they gave me a code to give Visiontek so that they would take the card back and replace it with a proper card. I have yet to receive a response. I have given up on Visiontek. They are the worst company I have ever had to deal with.....ever... Is it possible that Visiontek is right and that the problem doesn't lie with the card but with something else? Problem 2 Configuration: Identical to the one in problem one but with an Nvidia Geforce 6200SE Turbo Cache NOTE: At this point I was running Windows Vista 64bit While my ATI card was away, I had to dig out a much older card that I had in storage. I installed it and activated the drivers. However, when I got to the "Staring Windows" screen it hang there for what seemed like 10 minutes. When it finally did get to the login screen, it seemed to run fine. When Windows 7 RC Build 7057 came out, I upgraded hoping the fix the problem. However, the problem persisted. Today I tried going into my BIOS and tried disabling any unused devices (like Firewire) and other things. I also updated the BIOS. The problem is still there. Again, this problem only occurred after I installed the Nvidia card and activated the drivers. How can I fix this? There was a time when my machine ran perfectly. But with the failing of the ATI card, a litany of troubles was unleashed on me. Any help given would be greatly appreciated.